Allow an empty string in Variable Set action

Please allow to set a variable to an empty string, even with a warning if required.

There are several cases when this is useful, for example when combining multiple variables when you want one of them to concat without any value. Or when formatting with JSON a string like:

"name": "%myvalue%

and you want the var to be a string which could be empty. Yes, you can apply the quotes inside the var, but it is not as intuitive; or you can use Variable Convert with a null URL code, but this requires 2 actions.

Having the possibility to set the value to an empty string would be far more easy.